How are fishes able to survive in polar regions where the temperatures are as low as -50 degree celcius?
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Because water has different densities at different temperatures.
Explanation:
- The water has different densities at different temperatures.
- Underneath the frozen ponds and lakes, only the upper layer of water freezes and is displaced by the below layer of water and then it stops cooling further.
- This phenomenon also traps the adequate amount of oxygen in the layers which keeps the fishes and other aquatic life remains alive during the winter season.
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